| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | is [adj] for [verb] [noun pl] | 53 |
|
| 2 | [be] useful for [verb] [noun pl] | 18 |
|
| 3 | be useful for [verb] [noun pl] | 18 |
|
| 4 | is useful for [verb] [noun] | 11 |
|
| 5 | is useful [prep] [verb] [noun pl] | 9 |
|
| 6 | is useful [prep] [verb] [noun pl] | 9 |
|
| 7 | is useful for [verb] [noun pl] | 7 |
|
| 8 | [is] useful for [verb] [noun pl] | 7 |
|
